Unfortunately the info and "answers" even in the linked FAQ are lacking and ambiguous and somewhat contradictory.
The most obvious missing info is If you purchase the interface and are a new user what is the renewal price for the bundled software license in a year ? Will it be the regular PT price or will it be between Reg and Ultimate ?
If you have Regular PT already, you get both licenses BUT when the bundled software license expires and you don't renew it but keep your regular license plan going , do you then loose the additional plugins in the bundled license ?
If you currently have Ultimate on the renewable update plan (like I do ), But Carbon can't do surround (which honestly I don't need)...... Will I (when it's time to renew Jan 30 ) be able to just convert my Ultimate perpetual and update plan to a the REG PT Perpetual license and update plan at the Reg update renew fee ??? Obviously "all the answers" are not in that FAQ pdf